Plagiochasma (echinoderm)

{{Short description|Extinct genus of sea urchins}}

{{Italic title}}

{{Taxobox

| name = Plagiochasma

| fossil_range =

| image =

| image_caption =

| regnum = Animalia

| phylum = Echinodermata

| classis = Echinoidea

| infraclassis = Irregularia

| ordo =

| familia = Pygaulidae

| genus = Plagiochasma

| genus_authority = Pomel, 1883

| subdivision_ranks = Species

| subdivision = See text

}}

Plagiochasma is an extinct echinoderm genus in the family Pygaulidae.[http://www.nhm.ac.uk/research-curation/research/projects/echinoid-directory/taxa/taxon.jsp?id=544 Plagiochasma on the Natural History Museum website]

Species includes:

• Plagiochasma cruciferum (Morton, 1830); Paleocene of Denmark, Belgium, The Netherlands, Trinidad and the United States
• Plagiochasma faringdonense (Wright, 1875); Lower Greensand, Upper Aptian, Early Cretaceous of UK
• Plagiochasma olfersii (L. Agassiz, 1836); Hauterivian, Early Cretaceous of France and Switzerland
• Plagiochasma saurai Forner i Valls, 2016; Barremian, Early Cretaceous of Spain
• Plagiochasma texanum Smith & Rader, 2009; Lower Albian, Texas, USA